Atch 5 WeDateElm.pdf

FA5000-12-R-0001

Attachment 5

OPERATIONAL CLIMATIC DATA SUMMARY

STATION: ELMENDORF AFB, ALASKA STATION #: 702720 ICAO: PAED

LOCATION: 6115N 14948W ELEVATION (FEET): 194 LST = GMT -9

PREPARED BY: AFCCC/DOPS, MAY 2008 PERIOD: 197301-200602

SOURCE NO. JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN

1. TEMPERATURE ( F)

EXTREME MAX 1/2 50 58 56 73 80 86 86 84 74 66 57 53 86

MEAN DAILY MAX 1 20 26 33 44 55 63 65 64 55 40 27 21 43

MEAN 1 13 18 24 36 47 55 59 57 48 34 21 15 36

MEAN DAILY MIN 1 6 10 16 28 39 48 52 50 42 28 15 8 28

EXTREME MIN 1/2 -38 -43 -24 -20 0 33 34 29 15 -9 -23 -34 -43

# DAYS GE 90 1 0 0 0 0 0 0 0 0 0 0 0 0 0

# DAYS LE 32 1 31 28 30 22 3 0 0 # 3 21 28 31 195

# DAYS LE 0 1 11 7 4 # # 0 0 0 0 # 5 9 37

2. PRECIPITATION (INCHES)

MAXIMUM 2/3 2.6 2.9 3.6 3.0 2.0 3.7 4.9 8.6 6.3 4.1 2.9 3.5 23.9

MEAN 2 0.8 0.8 0.8 0.5 0.6 1.1 1.9 2.5 2.6 1.7 1.1 1.3 15.4

MINIMUM 3 # # 0 # # 0.1 0.3 0.3 0.2 0.2 0.1 0.1 10.3

MAX 24 HR 3 1.2 1.7 1.3 0.8 0.6 1.3 1.6 2.5 1.7 1.4 1.3 1.3 2.5

# DAYS W/PRECIP 2 18 15 14 12 16 16 18 20 20 18 18 20 205

# DAYS GE .01 2 8 7 7 5 6 8 12 14 14 12 9 10 112

# DAYS GE .5 2 # # # # # # 1 1 1 1 # # 6

3. SNOWFALL (INCHES)

MEAN 2 10.5 11.5 9.7 4.3 0.4 0 0 # 0.2 8.0 11.8 17.0 73.1

MAXIMUM 2/3 34.6 55.8 40.7 29.6 9.0 0 0 # 2.3 31.2 45.5 45.9 146.4

MAX 24 HR 2 11.6 16.1 14.9 10.0 8.7 0 0 # 2.3 18.4 14.6 15.0 18.4

# DAYS SNOWFALL 1 16 13 12 8 1 0 0 # 1 9 15 19 95

# DAYS GE 0.1 2 7 6 6 3 # 0 0 0 # 4 7 9 44

# DAYS GE 1.5 2 2 2 2 1 # 0 0 0 # 2 2 3 15

4. MEAN RELATIVE HUMIDITY (%) / VAPOR PRESSURE (IN HG) / DEWPOINT ( F)

RH ( 6 LST) 1 81 80 76 77 74 74 80 85 84 83 84 83 80

RH (15 LST) 1 80 72 59 54 49 52 62 63 66 72 80 83 66

VAPOR PRESS 1 .08 .09 .10 .14 .20 .28 .35 .35 .26 .16 .11 .09 .18

DEWPOINT 1 10 12 16 24 33 42 48 48 40 27 16 12 27

5. SURFACE WINDS 16 PT/KTS / 99.95% HIGHEST PRESSURE ALTITUDE (FEET)

PVLG DRCTN 1 $NNW $NNW N N W W W $W $N N $NNW $NE $N

MEAN SPEED

(PVLG DRCTN) 1 6 6 7 6 6 7 6 6 6 6 5 5 6

MEAN SPEED

(ALL OBS) 1 4 5 5 5 5 5 4 4 4 4 4 4 4

MAX PEAK GUST 2 66 61 52 41 54 36 48 42 47 62 72 64 72

PRESSURE ALT 1 1372 1362 1333 1157 1067 806 1085 1330 1368 1372 1372 1350 1372

6. MEAN CLOUD COVER (8THS) / THUNDERSTORMS / FOG / BLOWING SAND & DUST (BNBD)

CLD COVER 1 6 6 5 5 6 6 6 6 6 6 6 6 6

DAYS TSTMS 1 # 0 0 # # 1 1 1 # # 0 0 3

DAYS FOG LT 7 1 12 9 5 3 2 1 4 5 6 9 11 13 80

DAYS BNBD LT 7 1 0 0 # 0 0 # 0 # 0 0 0 0 #

7. PERCENTAGE FREQUENCY OF OCCURRENCE (% FREQ) OF CEILING AND/OR VISIBILITY

(CIG/VIS) LT 3000/3 STATUTE MILES (MI) (SOURCE NO. 1)

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN

00-02 LST 19 16 11 7 4 3 7 7 8 19 21 22 12

03-05 LST 21 16 11 8 5 4 10 10 9 20 23 23 13

06-08 LST 21 18 12 9 5 5 12 12 12 22 24 22 15

09-11 LST 20 18 13 7 4 6 13 12 10 20 23 21 14

12-14 LST 17 13 9 5 3 3 8 9 7 16 16 21 11

15-17 LST 15 13 8 4 2 2 5 6 6 15 17 21 9

18-20 LST 17 14 8 5 2 2 4 4 6 17 19 23 10

21-23 LST 18 15 10 6 2 2 5 5 6 18 21 23 11

ALL HOURS 19 15 10 6 3 3 8 8 8 18 21 22 12

REMARKS: * = DATA NOT AVAILABLE

# = LT 0.5 DAY, OR 0.05 INCH, OR 0.5% APPLICABLE

$ = % CALM GT PVLGN DRCTN

= BASED ONLY ON AVAILABLE DATA, I.E. LT 24 HRS/DAY, OR LT 12 MONTH/YR

ANNUAL TOTALS MAY NOT EQUAL THE SUM OF MONTHLY TOTALS DUE TO ROUNDING

SOURCE(S): 1. AFCCC DATSAV DATABASE, 197301-200602, 361046 TOTAL OBSERVATIONS

2. AFCCC SUMMARY OF DAY DATABASE, 194103 – 200512

3. WESTERN REGION CLIMATE CENTER, ELMENDORF AFB ALASKA, POR: 1951-97